A student is caught cheating with his cell-phone, and Chiaki is super-mad! He calls all the students to an assembly and angrily threatens to destroy the phone of anybody who's caught with one on school grounds.  The students begin to get angry...
to practice good behavior 
with their smartphones!
لأنّه أراد أن يلتزم الجميع بالسلوك في هواتفهم
um allen genau zu zeigen,
was beim Handygebrauch ein No-Go ist!
que todos se comportaran
con los celulares.
c’était pour inciter tout le monde
à être réglo !
voleva che le regole da seguire per gli smartphone 
fossero chiarissime per tutti.
passassem a se comportar com os celulares.
чтобы ученики благоразумнее
обходились с телефонами.